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MDEV-11297: Add support for LIMIT clause in GROUP_CONCAT()

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This commit is contained in:
Varun Gupta
2017-12-08 12:21:26 +05:30
parent 3aa618a969
commit 6d63a03490
9 changed files with 6287 additions and 12 deletions
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126
mysql-test/r/func_gconcat.result
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@ -1254,3 +1254,129 @@ DROP TABLE t1;
#
# End of 10.2 tests
#
#
# Start of 10.3 tests
#
drop table if exists t1, t2;
create table t1 (grp int, a bigint unsigned, c char(10) , d char(10) not null);
insert into t1 values (1,1,NULL,"a");
insert into t1 values (1,10,"b","a");
insert into t1 values (1,11,"c","a");
insert into t1 values (2,2,"c","a");
insert into t1 values (2,3,"b","b");
insert into t1 values (3,4,"E","a");
insert into t1 values (3,5,"C","b");
insert into t1 values (3,6,"D","c");
insert into t1 values (3,7,"E","c");
select grp,group_concat(c) from t1 group by grp;
grp group_concat(c)
1 b,c
2 c,b
3 E,C,D,E
select grp,group_concat(c limit 1 ) from t1 group by grp;
grp group_concat(c limit 1 )
1 b
2 c
3 E
select grp,group_concat(c limit 1,1 ) from t1 group by grp;
grp group_concat(c limit 1,1 )
1 c
2 b
3 C
select grp,group_concat(c limit 1,10 ) from t1 group by grp;
grp group_concat(c limit 1,10 )
1 c
2 b
3 C,D,E
select grp,group_concat(c limit 1000) from t1 group by grp;
grp group_concat(c limit 1000)
1 b,c
2 c,b
3 E,C,D,E
select group_concat(grp limit 0) from t1;
group_concat(grp limit 0)
select group_concat(grp limit "sdjadjs") from t1
--error ER_PARSE_ERROR
select grp,group_concat(c limit 5.5) from t1 group by grp ;
ERROR 42000: You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '"sdjadjs") from t1
--error ER_PARSE_ERROR
select grp,group_concat(c limit 5.5) f' at line 1
select grp,group_concat(distinct c limit 1,10 ) from t1 group by grp;
grp group_concat(distinct c limit 1,10 )
1 c
2 b
3 C,D
select grp,group_concat(c order by a) from t1 group by grp;
grp group_concat(c order by a)
1 b,c
2 c,b
3 E,C,D,E
select grp,group_concat(c order by a limit 2 ) from t1 group by grp;
grp group_concat(c order by a limit 2 )
1 b,c
2 c,b
3 E,C
select grp,group_concat(c order by a limit 1,1 ) from t1 group by grp;
grp group_concat(c order by a limit 1,1 )
1 c
2 b
3 C
select grp,group_concat(c order by c) from t1 group by grp;
grp group_concat(c order by c)
1 b,c
2 b,c
3 C,D,E,E
select grp,group_concat(c order by c limit 2) from t1 group by grp;
grp group_concat(c order by c limit 2)
1 b,c
2 b,c
3 C,D
select grp,group_concat(c order by c desc) from t1 group by grp;
grp group_concat(c order by c desc)
1 c,b
2 c,b
3 E,E,D,C
select grp,group_concat(c order by c desc limit 2) from t1 group by grp;
grp group_concat(c order by c desc limit 2)
1 c,b
2 c,b
3 E,E
drop table t1;
create table t2 (a int, b varchar(10));
insert into t2 values(1,'a'),(1,'b'),(NULL,'c'),(2,'x'),(2,'y');
select group_concat(a,b limit 2) from t2;
group_concat(a,b limit 2)
1a,1b
set @x=4;
prepare STMT from 'select group_concat(b limit ?) from t2';
execute STMT using @x;
group_concat(b limit ?)
a,b,c,x
set @x=2;
execute STMT using @x;
group_concat(b limit ?)
a,b
set @x=1000;
execute STMT using @x;
group_concat(b limit ?)
a,b,c,x,y
set @x=0;
execute STMT using @x;
group_concat(b limit ?)
set @x="adasfa";
execute STMT using @x;
ERROR HY000: Limit only accepts integer values
set @x=-1;
execute STMT using @x;
ERROR HY000: Incorrect arguments to EXECUTE
set @x=4;
prepare STMT from 'select group_concat(a,b limit ?) from t2';
execute STMT using @x;
group_concat(a,b limit ?)
1a,1b,2x,2y
drop table t2;
#
# End of 10.3 tests
#